For windows, make sure you have Xming / Xlaunch . On a mac desktop/laptop, install Xquartz (https://www.xquartz.org/ )and for Linux export Display

ssh -Y 10.250.250.3

and run the following command for firefox

singularity exec /sw/Containers/singularity/images/webbrowsers/firefox/firefox-vnc_latest.sif firefox

Firefox

Opera

singularity exec /sw/Containers/singularity/images/webbrowsers/opera/standalone-opera_latest.sif opera